Copying material for photographic purposes.



No. 728,345. PATENTED MAY 19, 1903.

" R. KRAYN.

COPYING MATERIAL FOR PHOTOGRAPHIG PURPOSES. APPLIQATION FILED mm: 14, 1903.

N0 MODEL.

Patented May 19, 1903'.

PATENT OFFICE.

ROBERT KRAYN, OF BERLIN, GERMANY.

COPYING MATERIAL FOR PHOTOGRAPHIC PURPOSES.

SPECIFICATION forming part of Letters Patent N 0. 728,245, dated May 19, 1903.

Application filed July 14, 1902. Serial No. 115,470. (No specimens.)

To all whom it may concern.-

Be it known that I, ROBERT KRAYN, a subject of the Emperor of Germany, residing at 36-37 Ohaussestrasse, Berlin, N., Germany, have invented a new and useful Copying Material for Photographic Purposes; and I do hereby declare the following to be a full, clear, and exact description of the same.

In the accompanying drawings, Figure l is a view of the film with its eiiterior coating ap-- the layer of gelatin is secured, by means of what I claim is an under layer 3 of rubber, &c.,' in the manner already well known in the photographic industry. The use of the new material is offected in such a manner that the chromated pigment-foils are placedin the copying-frame from behind under a negative, and consequently are exposed-through the thin layer of celluloid and through. the underlayer of rubber and are then placed in warm water. After a few minutes there is thereby produced the pigment -picture without any transfer. The picture thus directly produced possesses in consequence of the under layer of rubber or the like the quality of a photographic transfer-picture in pigment which can then be transferred to any other surface desired. In order to render the transfer more certain,

' it is advisableto provide either the pigmentpicture or the transfer material with an adhesive coating t of gelatin or the like in like pictures successively and superposing them upon one and the same piece of paper.

Instead of gelatin may obviously be used other organic substances which are soluble in cold water-such, for instance, as gumarabic, sugar, starch, dextrin, &c., or mixtures thereof.

Having thus fully set forth my invention,

1'. A copying material for the so-called pigment process consisting of a film of transparent material, a film of gelatin or its equivalent, and a layer of rubber or its equivalent interposed between the two films aforesaid.

2. A copying material for the so-called pigment process, consisting of a film of transparent material, a layer of rubber or its equivalent superposed thereon, a film of gelatin mixed with color superposed on the rubber, and an exterior coating of gelatin. In testimony whereof I have signed this specification in the presence of two subsc'ribing witnesses.

Witnesses:

- HENRY HAsPER, I WoLnnMAR HAUPT. F

[ 'YROBERT KRAYN.. 

